Connecting 2 SMPS in series at the input side has a risk associated with it, if any of the SMPS input power is less than other SMPS (imbalance in the input impedance in spite of connecting secondary in series due to mismatched efficiency), that SMPS will get subjected to a higher voltage on its input. Also any failure in one SMPS may cause other SMPS to fail too.
switch on startup delays also will cause failures.
440V to 240V transformer might be a costly but safe option.